Door-lock



W. A. LURIE.

DOOR LOCK.

APPLICATION FILED DEC 12, 1919.

Patented Sept. 7, 1920.

2 SHEETSSHEET 1.

//v Vf/VTOR MAL/AM A. LU/P/E,

W. A. LURIE.

DOOR LOCK.

APPLICATION FILED DEC. 12. I919.

Patented Sept. 7, 1920.

2 SHEETSSHEET 2.

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U N l I1 DOOR-LOCK.

Specification of Letters Patent.

Patented Sept, *7, 19262.

Application filed December 12, 1919. Serial No. 344,366.

To all whom it may concern:

Be it known that I, IVILLIAM A. LURIE, a citizen of the United States, and a resident of New Orleans, in the parish of Orleans and State of Louisiana, have invented certain new and useful Improvements in DOOILOCkS of which the following is a specification.

My invention relates to door locks and in general the object is to produce a simple, practical, inexpensive and eflicient lock which overcomes a great many of the objections, failures and disadvantages in prior locks. My improved lock is of particular adaptability and desirability in hotels, for example, where it is desired to prevent entrance into-rooms from the outside except by the use of a key, and where a door can be permanently locked from the inside without applying a key to the lock. More in detail, one of the important objects of my invention is to dispense with the complicated construction and arrangement involving a latch bar and a locking bolt, the latch bar to yield when the door is closed and to automatically enter the jambflopening, and the bolt to be turned by key to permanently lock the door. In my construction I emplo'y only a single bolt member which serves the double purpose of permanently locking the door so far as the outside is concerned, and which also acts as a latch to automatically spring into place and lock the door when the door is closed. An ordinary lever controlled by a knob from the inside serves to release the bolt to permit opening of the door, while the bolt can only be released from the outside by use of a key.

Another important object of my invention is to provide a locking bolt which is shifted outwardly from the lock to engage with a jamb supported locking member, and which must be shifted outwardly either from the inside or the outside to be released from the jamb member to permit opening of the door.

Another object of the invention is to provide such construction and operation that it will be impossible to shift the bolt into unlocking position when the door is closed, from the outside of-the door, the j amb-locking member serving as an eflicient guard to prevent access to the bolt end.

Another object of the invention is to provide a ball and socket locking connection between the door lock and the jamb, thelock bolt having at its outer end'the ball member and the socket member being countersunk and secured in the doorvframe, and provided with a side entrance for the ball member on the bolt.

Another object of the invention is to provide improved means for preventing removal from the outside of the door of the key-receiving lock barrel, such lock barrel being locked against turning by means within the lock frame instead of by means of set screws or other mechanism entering through the lock escutcheon plate as is the case in prior structures.

The above and other important features of my invention are disclosed in a lock illustrated on the accompanying drawing, in which drawing Figure 1 is a side elevational view of the lock and the jamb member, the side plates of the lock being removed,

B Fig. 2 is a sectional view on plane 22 Fig.3 is a sectional view on plane 33 Fig. 1, and

Fig. 4 is a sectional view on plane 4L":l:, Fig. 3.

'The lock comprises the rectangular shallow box or container 10 of metal of suitable strength, this container being closed at its front edge by the escutcheon plate 11, and the side wall 12 being in the form of a removable plate held in place by screws 13 threading into lugs 14 extending from the opposite wall of the lock container. In the escutcheon plate is the cylindrical passageway 15, through which passes the shank 16 of the locking bolt. Extending upwardly from the permanent side wall of the lock container are the lugs 17 and 18 between which the locking bolt passes, these lugs together with the opening 15 guiding the bolt for longitudinal reciprocation. At its outer end the bolt 16 has the head or ball 19 which is conical on the inner side as indicated at 20 and whose outer end is convex as indicated at 21, there being a narrow substantially cylindrical section '22 between the conical and convex ends. The inner half of the bolt is threaded as indicated at 23 and receives the abutment block 24 which is located in front of the lugs 17 and 18, a compression spring 25 encircling the bolt be tween this block and the escutcheon plate and tending to hold the bolt inwardly with the head 19 abutting at its base against the escutcheon plate. Another abutment block 26 is threaded on to the bolt and has a pin hole 27 therethrough at right angles with the bolt through which a pin 28 is inserted to project into the longitudinal slot 29 cut in the bolt. The block 26 serves as an abutment for the lever 30 which extends from the hub 31 having the reduced ends 32 and 33 bearing respectively in openings 34 and 35 provided in the cover plate 12 and the opposite wall respectively. The hub has the polygonal opening 36 therethrough for receiving the polygonal spindle 37 to whose end is secured the knob 38, the spindle extending through the inner door escutcheon plate 39, the knob being on the inside of the door so that the hub can be turned only from the inside. The spindle is held in place by means of a washer 40 and screw 41 which screw threads into the outer end of the spindle, the clearance opening 42 being provided in the door body but covered by the outer door escutcheon 42 so that access cannot be had to the screw from the outside. I prefer to have a knob only on the inside of the spindle but it is evident that the spindle can be extended through the outer escutcheon plate 43 and provided also with a knob on the outside of the door.

The lever 30 is behind the abutment block 26 so that when the knob is turned in counter clockwise direction from the inside of the door the bolt 16 will be shifted outwardly. The block is positioned on the bolt so that the proper abutment is provided and the bolt will be shifted outwardly the required distance. In assembling the lock the blocks 24 and 26 are placed in position and the bolt 16 then inserted through the escutcheon opening 15 and threaded through the blocks. Instead of having the spring 25 normally hold the bolt with the head 19 against the escutcheon plate 11 the block 24 could be positioned on the bolt so that pressure of the head against the plate would be prevented and the force of the spring normally taken up. by the en agement between the block 24 and the lugs 1 and 18.

Through the openings 43. 44 and 45 provided respectively in the door escutcheon plate 43, thedoor body, and the permanent wall of the lock housing, is inserted'the cylindrical lock body or barrel 46. the wall surrounding the opening 45 being threaded to receive the barrel which is also threaded. Inside of the lock housing and adjacent the opening 45 is the lug 47 which has the cylindrical barrel 46, and in this lug is the threaded hole 49 which is incomplete but which is completed when the threaded notch 50 in the barrel 46 comes into registration therewith. The barrel is screwed into place and the sectional screw 51 is inserted which will prevent turning of the barrel. This screw being on the inside of the lock housing, it is impossible to unscrew the barrel 46 from the outside of the door.

Extending through the barrel 46 at one side of its center is the lock cylinder 53 whose rotation is controlled by the cotiperation of the key is with tumblers provided in the barrel, all in the well known manner. The cylinder has secured at its inner end the tongue or lever 54 and when the cylinder is turned from the outside of the door by means of the key this lever will rotate and engage against the inner side of the abutment block 26 and the bolt 16 will be shifted outwardly.

In the door frame or jamb 54 is secured the socket member 55, the recess 56 being preferably provided into which the member can be inserted from the inside of the room, the flange 57 being secured to the jamb by the screw 58 to hold the member 55 securely in position. Secured against the jamb and over the flange 57 and the screw 58 'is the abutment strip 59 for receiving the door when it is closed. 'The screw is in such position that its head is partly covered by the door so that even if the strip 59 is removed the screw cannot .be withdrawn to release the member 55. The member may be the front wall 63 of the member 55 is the I inlet opening 64 for the head, the wall 63 in front of the socket 62 being solid except for the entrance slot 65 through which the shank of the locking bolt passes. Above and below this slot are the guide projections 66 and 67 which are beveled on their inner faces to provide the inclines 68and 69 for guiding the bolt head into the socket 62. The outer edges of the projections 66 and 67 are rounded as indicated at 70 and 71 so that the points 72 and 73 are formed for receiving the conical base of the head and guiding it onto the surfaces 68 and 69 along which the head will then travel until it is free to enter the socket 62. Outward movement of the bolt is resisted by the spring 25 and when the head has entered the bore 61 it snaps into the socket, and then the cylindrical section 22 of the head will be in engagement with the cylindrical section of the bore 61 and the door cannot be opened until the bolt is shifted outwardly a sufiicient distance either by turning of the knob or the key. The door will not open easily until the bolt has been shifted outwardly a sui'licient distance to bring the head of the bolt entirely clear of the projections 66 and 67. If shifted outwardly -only a short distance the conical surface 20 face will slide along the projections and pull the bolt out against the force of the spring My improved construction is thus a radical departure from prior constructions in that thebolt must be shifted outwardly to unlock the door. In prior constructions the lock bolt is shifted inwardly to unlock the door. For this very reason it has been possible in prior constructions to insert an implement between the door and the jamb and force the bolt inwardly, or force the spring latch bolt inwardly. In my construction this is impossible. Even if an implement were inserted between the door and the jainb it could not obtain any hold on the bolt. Even if a hold could be obtained the socket member 55 would prevent inward shifting of the bolt. It would have to be shifted outwardly a suiiicient distance to clear the cylindrical section 22 from the projections 66 and 67 before the door could be pushed open, but such movement would be impossible with any implement that coullgl be inserted between the door and the am My improved ball and socket locking c0n-. nection has also another decided and important advantage in that it keeps the door from rattling. The spring 25 will always keep the bolt head firmly against the socket member 55 and will prevent any play which could permit the door to rattle. To close the door from the inside and securely lock it, it is merely pushed shut, the conical head of the bolt engaging along the incline projections 66 and 67 and snapping into the socket. -To unlock the door from the inside it is merely necessary to turn the knob, but to unlock the door from the outside the key must be inserted and turned. The 00- cupant of the room does not therefore have to bother with turning a key after he enters the room in order to keep people from entering the room without permission.

My improved lock is of extreme simplicity. It is entirely devoid of complicated and inter-working parts which could readily get out of order and cause trouble and expense. I employ only a very small number of parts which are strong and substantial and whose cooperation is so simple ,that there is no chance for derangement or inoperative displacement. None of the parts except the barrel 46 are accessible from the outside, and such barrel can only be respaced and arranged when the lock is assembled and thereafter will require no further adjustment.

I do not desire to be limited to the exact construction, arrangement and operation shown and described as changes and modifications are no doubt possible which would still come within the scope of my invention.

I claim as follows 1. In a door locking mechanism, the combination of a lock frame secured to the door, a locking bolt extending into said frame from the front end thereof, a head at the outer end of said bolt, the inner end of said bolt being threaded, a washer threaded on said bolt, a spring between said washer and said frame tending to shift said bolt inwardly with its head against the front of the frame, another washer threaded on to said bolt, a knob, a spindle supporting said knob and extending through said frame, and a tongue on said spindle forcooperating with said second. washer to shift said bolt outwardly against the force of said spring.

2. In door locking mechanism, the combination of a lock frame secured to the door, a locking bolt extending from the exterior of and through said frame and having a conical head at its outer end, guide ears in said frame between which said bolt extends, the inner end of said bolt being threaded, a nut on said threaded end at one side of said ears, a spring between said nut and said frame tending to shift said bolt inwardly, a second nut on said bolt at the other side of said ears, a door handle, a spindle extending from said handle to said frame, an arm on said spindle for cooperating with said second nut to shift said bolt outwardly against the force of said spring, and a jamb member having a socket for receiving said bolt head.

3. In door locking mechanism, the combination of a lock frame secured to the door, having a hole through its front wall, a locking bolt extending through said hole and transversely across the interior of said frame, a conical head at the outside end of said bolt, an abutment member on said bolt, a spring between said abutment member and the front wall of said frame tending to hold said bolt in with its head against the outer side of said front wall, the inner end of said bolt being threaded, a nut adjustably receiving said threaded end, a spindle, an arm on said spindle for cooperating with said nut to shift said bolt outwardly, and a handle on said spindle.

4. In door locking mechanism, the combination of a lock frame secured to the door, a lock bolt extending through said frame and having a locking head at its outer end, a springtending to'shift said bolt inwardly,

a lock barrel extended into said frame from the outside of the door, a wall in said frame adjacent said lock barrel having a pocket for receiving said barrel, a screw threading partly into said wall and said barrel for preventing rotation of said barrel, a key cylinder rotatable in said barrel and having an arm at its inner end Within said frame, and an adjustable abutment on said bolt with which said tongue cooperates to shift said bolt outwardly.

5. In lock mechanism of the class described, the combination of a lock frame, a bolt extending transversely in said frame,

a spring tendingvto shift said bolt inwardly, the inner end of said bolt being threaded and longitudinally slotted, a nut engaging said threaded end, a pin extending radially through said nut into one of said slots to lock said nut against rotation on said bolt, a rotatable member extending into said frame, and an arm on said rotatable member for cooperating with said nut to shift said bolt.

In witness whereof, I hereunto subscribe my name this Mth day of November A. D.,

WVILLIAM A. LURIE. 

